The title says 120cc but the description says 30cc which is it???

it is 4oz. So the bottle it comes in is about 3 inches tall and approximately 1-3/4 inches in diameter. hope that helps.

Can I used it in a magnetic vacuum seal?

The EFH-1 type listed here is not recommended for use in speakers and I would guess that EFH 1 would not have the correct viscosity for use in seals.

What is the size of the nanoparticles in nm? Can you wash off the oil and resuspend in water?

i don't remember what the size was, although 4 nano meters comes to mind. If you removed the oil and tried to suspend them in water, the particles would oxidize(being exposed to oxygen) and would gather together into redish clumps. All the smooth fluidity would be no more.

Is this an authentic ferrotec fluid? what is the model number for it? amgxxx emgxxx etc etc etc

Yes, .. this efh1... part number is 92u40000000 / lot number v121021a.. this educational FF.. not for speakers etc

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4 oz (120 ml) Magnetic Ferrofluid Science Bottle – Interactive Liquid Magnet Display for Experiments, Demonstrations & STEM Projects

Product ID: 10379316

🔬Visualizes magnetic fields live

🧲120 mL ferrofluid volume

♻️Reusable & long-lasting formula

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Description

🧲 Unlock the invisible forces of magnetism—see science in motion!

CLASSROOM BEYOND - Ideal for educators, science fairs, and curious professionals aiming to visualize complex magnetic interactions.
DURABLE REUSABLE - Engineered for repeated demonstrations without losing magnetic responsiveness or fluid integrity.
READY TO USE SCIENCE - Pre-sealed 120 mL bottle means no prep—just open and start exploring magnetic phenomena instantly.
STEM LEARNING ELEVATED - Perfect for hands-on experiments that decode magnetism, superparamagnetism, and ferromagnetic behavior.
MAGNETIC MAGIC IN MOTION - Watch magnetic fields come alive as ferrofluid dynamically shapes itself around magnets.

This 4 oz (120 mL) Magnetic Ferrofluid Science Bottle offers a visually stunning, interactive way to explore magnetic fields and behaviors. Designed for STEM education and demonstrations, it provides a ready-to-use, reusable ferrofluid that reacts vividly to standard magnets, making complex magnetic principles accessible and engaging for learners and professionals alike.

Specifications

ASIN	B00126LYAG
Age Range Description	Adult
Best Sellers Rank	#520,959 in Toys & Games ( See Top 100 in Toys & Games ) #4,573 in Educational Science Kits
Brand Name	Applied Magnets
Color	Black
Customer Reviews	4.3 4.3 out of 5 stars (91)
Educational Objective	Science
Included Components	Ferrofluid
Indoor Outdoor Usage	Indoor
Item Type Name	Ferrofluid
Item Weight	0.22 kg
Manufacturer	Applied Magnets
Manufacturer Part Number	F-4oz
Manufacturer recommended age	12 years and up
Material Type	Synthetic,Magnetic
Model Number	F-4oz
Number of Packs	1
Operation Mode	Manual
Size	Large
Subject Character	Ferrofluid
Theme	Science
UPC	816799012953

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COP 274428

Duties & taxes included

In stock

Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Colombia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

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